关键词: 麦克风阵列, FPGA计时, 声源定位, 单片机控制电机

Abstract:

This project uses a specific frequency sound signal as the sound source of the car navigation,so that the car can be implemented by receiving and processing signals.The car determines the sound source direction and position,and proceeds to the sound source.Hardware filtering circuit is employed to filter the sound signal and the time difference of the acoustic signal arrivals is computed with FPGA,and the microcontroller calculates the angle and distance of the sound source deviating from the trolley and generates a PWM wave to drive the motor.In the process of moving the car can track moving sound source independently and correct movement path.Reaching the accurate sound source is the focus and difficulty.

Key words: microphone array;FPGA;sound source localization;single-chip control motor